package com.framework.bdf4j.tool.gen.service;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

import com.framework.bdf4j.tool.gen.mapper.*;
import org.apache.commons.io.IOUtils;
import org.apache.velocity.Template;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.Velocity;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.metadata.OrderItem;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.framework.bdf4j.comm.Constants;
import com.framework.bdf4j.comm.exception.ServiceException;
import com.framework.bdf4j.comm.util.StringUtils;
import com.framework.bdf4j.comm.util.text.Convert;
import com.framework.bdf4j.comm.web.WebUtil;
import com.framework.bdf4j.tool.gen.entity.GenTable;
import com.framework.bdf4j.tool.gen.entity.GenTableColumn;
import com.framework.bdf4j.tool.gen.entity.dto.GenTableQueryDto;
import com.framework.bdf4j.tool.gen.util.GenConstants;
import com.framework.bdf4j.tool.gen.util.GenUtils;
import com.framework.bdf4j.tool.gen.util.VelocityInitializer;
import com.framework.bdf4j.tool.gen.util.VelocityUtils;

/**
 * 业务 服务层实现
 * 
 */
@Service
public class GenTableServiceImpl extends ServiceImpl<GenTableMapper, GenTable> implements IGenTableService {
    private static final Logger log = LoggerFactory.getLogger(GenTableServiceImpl.class);

    @Autowired
    private GenTableMapper genTableMapper;
    @Autowired
    private GenTableOMapper genTableOMapper;
    @Autowired
    private GenTableDMapper genTableDMapper;
    @Autowired
    private GenTablePMapper genTablePMapper;
    @Autowired
    private GenTableColumnMapper genTableColumnMapper;
    @Autowired
    private GenTableColumnOMapper genTableColumnOMapper;
    @Autowired
    private GenTableColumnDMapper genTableColumnDMapper;
    @Autowired
    private GenTableColumnPMapper genTableColumnPMapper;
    @Autowired
    DruidDataSource dataSource;

    private IGenTable getGenTableMapper() {
        String dbtype = dataSource.getDbType();
        if (dbtype.equalsIgnoreCase("oracle")) {
            return genTableOMapper;
        } else if (dbtype.equalsIgnoreCase("db2")) {
            return genTableDMapper;
        } else if (dbtype.equalsIgnoreCase("postgresql")) {
            return genTablePMapper;
        } else {
            return genTableMapper;
        }
    }

    private IGenTableColumn getGenTableColumnMapper() {
        String dbtype = dataSource.getDbType();
        if (dbtype.equalsIgnoreCase("oracle")) {
            return genTableColumnOMapper;
        } else if (dbtype.equalsIgnoreCase("db2")) {
            return genTableColumnDMapper;
        } else if (dbtype.equalsIgnoreCase("postgresql")) {
            return genTableColumnPMapper;
        } else {
            return genTableColumnMapper;
        }
    }

    /**
     * 查询业务信息
     * 
     * @param id
     *            业务ID
     * @return 业务信息
     */
    @Override
    public GenTable selectGenTableById(Long id) {
        GenTable genTable = getGenTableMapper().selectGenTableById(id);
        setTableFromOptions(genTable);
        return genTable;
    }

    /**
     * 查询业务列表
     * 
     * @param genTableQueryDto
     *            业务信息
     * @return 业务集合
     */
    @Override
    public IPage selectGenTableList(Page page, GenTableQueryDto genTableQueryDto) {
        return getGenTableMapper().selectGenTableList(page, genTableQueryDto);
    }

    /**
     * 查询据库列表
     * 
     * @param genTable
     *            业务信息
     * @return 数据库表集合
     */
    @Override
    public IPage selectDbTableList(Page page, GenTable genTable) {
    	String dbtype = dataSource.getDbType();
    	List<OrderItem> orders = page.getOrders();
    	List<OrderItem> norders = new ArrayList<OrderItem>();
        if (dbtype.equalsIgnoreCase("oracle")) {
        	for (OrderItem orderItem : orders) {
        		if(orderItem.getColumn().equalsIgnoreCase("TABLE_NAME")) {
        			orderItem.setColumn("ut.table_name");
        		}else if(orderItem.getColumn().equalsIgnoreCase("TABLE_COMMENT")) {
        			orderItem.setColumn("utc.comments");
        		}else if(orderItem.getColumn().equalsIgnoreCase("CREATE_TIME")) {
        			orderItem.setColumn("uo.CREATED");
        		}else if(orderItem.getColumn().equalsIgnoreCase("UPDATE_TIME")) {
        			orderItem.setColumn("uo.LAST_DDL_TIME");
        		}
        		norders.add(orderItem);
			}
        	page.setOrders(norders);
        } else if (dbtype.equalsIgnoreCase("postgresql")) {
            for (OrderItem orderItem : orders) {
                if(orderItem.getColumn().equalsIgnoreCase("CREATE_TIME")) {
                    continue;
                }else if(orderItem.getColumn().equalsIgnoreCase("UPDATE_TIME")) {
                    continue;
                }
                norders.add(orderItem);
            }
            page.setOrders(norders);
        }
        return getGenTableMapper().selectDbTableList(page, genTable);
    }

    /**
     * 查询据库列表
     * 
     * @param tableNames
     *            表名称组
     * @return 数据库表集合
     */
    @Override
    public List<GenTable> selectDbTableListByNames(String[] tableNames) {
        return getGenTableMapper().selectDbTableListByNames(tableNames);
    }

    /**
     * 修改业务
     * 
     * @param genTable
     *            业务信息
     * @return 结果
     */
    @Override
    @Transactional
    public void updateGenTable(GenTable genTable) {
        String options = JSON.toJSONString(genTable.getParams());
        genTable.setOptions(options);
        int row = getGenTableMapper().updateGenTable(genTable);
        if (row > 0) {
            for (GenTableColumn cenTableColumn : genTable.getColumns()) {
                getGenTableColumnMapper().updateGenTableColumn(cenTableColumn);
            }
        }
    }

    /**
     * 删除业务对象
     * 
     * @param ids
     *            需要删除的数据ID
     * @return 结果
     */
    @Override
    @Transactional
    public void deleteGenTableByIds(String ids) {
        getGenTableMapper().deleteGenTableByIds(Convert.toLongArray(ids));
        getGenTableColumnMapper().deleteGenTableColumnByIds(Convert.toLongArray(ids));
    }

    /**
     * 导入表结构
     * 
     * @param tableList
     *            导入表列表
     */
    @Override
    @Transactional
    public void importGenTable(List<GenTable> tableList) {
        String operName = WebUtil.getHttpCurrentUserName();
        for (GenTable table : tableList) {
            try {
                String tableName = table.getTableName();
                GenUtils.initTable(table, operName);
                int row = getGenTableMapper().insertGenTable(table);
                if (row > 0) {
                    // 保存列信息
                    List<GenTableColumn> genTableColumns = getGenTableColumnMapper().selectDbTableColumnsByName(tableName);
                    for (GenTableColumn column : genTableColumns) {
                        GenUtils.initColumnField(column, table);
                        getGenTableColumnMapper().insertGenTableColumn(column);
                    }
                }
            } catch (Exception e) {
                log.error("表名 " + table.getTableName() + " 导入失败：", e);
            }
        }
    }

    /**
     * 预览代码
     * 
     * @param tableId
     *            表编号
     * @return 预览数据列表
     */
    @Override
    public Map<String, String> previewCode(Long tableId) {
        Map<String, String> dataMap = new LinkedHashMap<>();
        // 查询表信息
        GenTable table = getGenTableMapper().selectGenTableById(tableId);
        // 查询列信息
        List<GenTableColumn> columns = table.getColumns();
        setPkColumn(table, columns);
        VelocityInitializer.initVelocity();

        VelocityContext context = VelocityUtils.prepareContext(table);

        // 获取模板列表
        List<String> templates = VelocityUtils.getTemplateList(table.getTplCategory());
        for (String template : templates) {
            // 渲染模板
            StringWriter sw = new StringWriter();
            Template tpl = Velocity.getTemplate(template, Constants.DEFAULT_CHARSET);
            tpl.merge(context, sw);
            dataMap.put(template, sw.toString());
        }
        return dataMap;
    }

    /**
     * 生成代码
     * 
     * @param tableName
     *            表名称
     * @return 数据
     */
    @Override
    public byte[] generatorCode(String tableName) {
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        ZipOutputStream zip = new ZipOutputStream(outputStream);
        generatorCode(tableName, zip);
        IOUtils.closeQuietly(zip);
        return outputStream.toByteArray();
    }

    /**
     * 批量生成代码
     * 
     * @param tableNames
     *            表数组
     * @return 数据
     */
    @Override
    public byte[] generatorCode(String[] tableNames) {
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        ZipOutputStream zip = new ZipOutputStream(outputStream);
        for (String tableName : tableNames) {
            generatorCode(tableName, zip);
        }
        IOUtils.closeQuietly(zip);
        return outputStream.toByteArray();
    }

    /**
     * 查询表信息并生成代码
     */
    private void generatorCode(String tableName, ZipOutputStream zip) {
        // 查询表信息
        GenTable table = getGenTableMapper().selectGenTableByName(tableName);
        // 查询列信息
        List<GenTableColumn> columns = table.getColumns();
        setPkColumn(table, columns);

        VelocityInitializer.initVelocity();

        VelocityContext context = VelocityUtils.prepareContext(table);

        // 获取模板列表
        List<String> templates = VelocityUtils.getTemplateList(table.getTplCategory());
        for (String template : templates) {
            // 渲染模板
            StringWriter sw = new StringWriter();
            Template tpl = Velocity.getTemplate(template, Constants.DEFAULT_CHARSET);
            tpl.merge(context, sw);
            try {
                // 添加到zip
                zip.putNextEntry(new ZipEntry(VelocityUtils.getFileName(template, table)));
                IOUtils.write(sw.toString(), zip, Constants.DEFAULT_CHARSET);
                IOUtils.closeQuietly(sw);
                zip.flush();
                zip.closeEntry();
            } catch (IOException e) {
                log.error("渲染模板失败，表名：" + table.getTableName(), e);
            }
        }
    }

    /**
     * 修改保存参数校验
     * 
     * @param genTable
     *            业务信息
     */
    @Override
    public void validateEdit(GenTable genTable) {
        if (GenConstants.TPL_TREE.equals(genTable.getTplCategory())) {
            String options = JSON.toJSONString(genTable.getParams());
            JSONObject paramsObj = JSONObject.parseObject(options);
            if (StringUtils.isEmpty(paramsObj.getString(GenConstants.TREE_CODE))) {
                throw new ServiceException("树编码字段不能为空");
            } else if (StringUtils.isEmpty(paramsObj.getString(GenConstants.TREE_PARENT_CODE))) {
                throw new ServiceException("树父编码字段不能为空");
            } else if (StringUtils.isEmpty(paramsObj.getString(GenConstants.TREE_NAME))) {
                throw new ServiceException("树名称字段不能为空");
            }
        }
    }

    /**
     * 设置主键列信息
     * 
     * @param genTable
     *            业务表信息
     * @param columns
     *            业务字段列表
     */
    public void setPkColumn(GenTable table, List<GenTableColumn> columns) {
        for (GenTableColumn column : columns) {
            if (column.isPk()) {
                table.setPkColumn(column);
                break;
            }
        }
        if (StringUtils.isNull(table.getPkColumn())) {
            table.setPkColumn(columns.get(0));
        }
    }

    /**
     * 设置代码生成其他选项值
     * 
     * @param genTable
     *            设置后的生成对象
     */
    public void setTableFromOptions(GenTable genTable) {
        JSONObject paramsObj = JSONObject.parseObject(genTable.getOptions());
        if (StringUtils.isNotNull(paramsObj)) {
            String treeCode = paramsObj.getString(GenConstants.TREE_CODE);
            String treeParentCode = paramsObj.getString(GenConstants.TREE_PARENT_CODE);
            String treeName = paramsObj.getString(GenConstants.TREE_NAME);
            genTable.setTreeCode(treeCode);
            genTable.setTreeParentCode(treeParentCode);
            genTable.setTreeName(treeName);
        }
    }
}